#*************************************************************************** #* (c) sliptonic (shopinthewoods@gmail.com) 2014 * #* * #* This file is part of the FreeCAD CAx development system. * #* * #* This program is free software; you can redistribute it and/or modify * #* it under the terms of the GNU Lesser General Public License (LGPL) * #* as published by the Free Software Foundation; either version 2 of * #* the License, or (at your option) any later version. * #* for detail see the LICENCE text file. * #* * #* FreeCAD is distributed in the hope that it will be useful, * #* but WITHOUT ANY WARRANTY; without even the implied warranty of * #* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * #* GNU Lesser General Public License for more details. * #* * #* You should have received a copy of the GNU Library General Public * #* License along with FreeCAD; if not, write to the Free Software * #* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * #* USA * #* * #***************************************************************************/ ''' This is an postprocessor file for the Path workbench. It will output path data in a format suitable for OpenSBP controllers like shopbot. This postprocessor, once placed in the appropriate PathScripts folder, can be used directly from inside FreeCAD, via the GUI importer or via python scripts with: import Path Path.write(object,"/path/to/file.ncc","post_opensbp") ''' import datetime now = datetime.datetime.now() from PathScripts import PostUtils OUTPUT_COMMENTS = False OUTPUT_HEADER = True SHOW_EDITOR = True COMMAND_SPACE = "," #Preamble text will appear at the beginning of the GCODE output file. PREAMBLE = ''' ''' #Postamble text will appear following the last operation. POSTAMBLE = ''' ''' #Pre operation text will be inserted before every operation PRE_OPERATION = ''' ''' #Post operation text will be inserted after every operation POST_OPERATION = ''' ''' #Tool Change commands will be inserted before a tool change TOOL_CHANGE = ''''A tool change is about to happen ''' def move(commandline): print "processing a move" txt = "" if commandline['F'] != None : #Feed Rate has changed print "command contains an F" txt += feedrate(commandline) if commandline['command'] == 'G0': txt += "J3" else: txt += "M3" for p in ['X','Y','Z']: if commandline[p] == None: txt += "," + format(CurrentState[p], '.4f') else: txt += "," + format(eval(commandline[p]), '.4f') CurrentState[p] = eval(commandline[p]) txt += "\n" return txt def feedrate(commandline): #figure out what kind of feed rate we're talking about jog or move NOCHANGE = False txt = "" setspeed = eval(commandline['F']) if commandline['command'] == 'G1': #move movetype = "MS" else: #jog movetype = "JS" print "movetype: " + movetype if commandline['X'] == None: newX = CurrentState['X'] else: newX = eval(commandline['X']) if commandline['Y'] == None: newY = CurrentState['Y'] else: newY = eval(commandline['Y']) if commandline['Z'] == None: newZ = CurrentState['Z'] else: newZ = eval(commandline['Z']) if newX == CurrentState['X'] and newY == CurrentState['Y']: # ZMove only AXISMOVE = "Z" if CurrentState[movetype+'Z'] == setspeed: NOCHANGE = True else: AXISMOVE = "XY" if CurrentState[movetype+'XY'] == setspeed: NOCHANGE = True if AXISMOVE == "XY" and newZ != CurrentState['Z']: AXISMOVE = "XYZ" if CurrentState[movetype+'XY'] == setspeed and CurrentState[movetype+'Z'] == setspeed: NOCHANGE = True print "axismove: " + AXISMOVE #figure out if it has actually changed. if NOCHANGE == True: txt = "" else: #something changed if AXISMOVE == "XY": txt += movetype + "," + format(setspeed, '.4f') CurrentState[movetype+'XY'] = setspeed elif AXISMOVE == "Z": txt += movetype + ",," + format(setspeed, '.4f') CurrentState[movetype+'Z'] = setspeed else: #XYZMOVE txt += movetype + "," + format(setspeed, '.4f') + "," + format(setspeed, '.4f') print txt CurrentState[movetype+'XY'] = setspeed CurrentState[movetype+'Z'] = setspeed txt += "\n" return txt def arc(commandline): if commandline['command'] == 'G2': #CW dirstring = "1" else: #G3 means CCW dirstring = "-1" txt = "CG,," txt += format(eval(commandline['X']), '.4f') + "," txt += format(eval(commandline['Y']), '.4f') + "," txt += format(eval(commandline['I']), '.4f') + "," txt += format(eval(commandline['J']), '.4f') + "," txt += "T" + "," txt += dirstring txt += "\n" return txt def tool_change(commandline): print "tool change" txt = "" if OUTPUT_COMMENTS: txt += "'a tool change happens now\n" for line in TOOL_CHANGE.splitlines(True): txt += line txt += "&ToolName = " + commandline['T'] txt += "\n" txt += "&Tool=" + commandline['T'] txt += "\n" return txt def comment(commandline): print "a comment" def spindle(commandline): txt ="" if commandline['command'] == "M3": #CW pass else: pass txt += "TR," + commandline['S'] return txt #Supported Commands scommands = {"G0": move, "G1": move, "G2": arc, "G3": arc, "M6": tool_change, "M3": spindle, "message": comment } CurrentState = {'X':0, 'Y':0, 'Z':0, 'F':0, 'S':0, 'JSXY':0, 'JSZ':0, 'MSXY':0, 'MSZ':0} def parse(inputstring): "parse(inputstring): returns a parsed output string" print "postprocessing..." output = "" params = ['X','Y','Z','A','B','I','J','K','F','S','T'] #This list control the order of parameters # write some stuff first if OUTPUT_HEADER: print "outputting header" output += "'Exported by FreeCAD\n" output += "'Post Processor: " + __name__ +"\n" output += "'Output Time:"+str(now)+"\n" #Write the preamble if OUTPUT_COMMENTS: output += "'begin preamble\n" for line in PREAMBLE.splitlines(True): output += line # treat the input line by line lines = inputstring.splitlines(True) for line in lines: commandline = PostUtils.stringsplit(line) command = commandline['command'] try: print commandline print "command: " + command print command in scommands output += scommands[command](commandline) except: print "I don't know what the hell the command: " + command + " means. Maybe I should support it." print "finished" # write some more stuff at the end if OUTPUT_COMMENTS: output += "'begin postamble\n" for line in POSTAMBLE.splitlines(True): output += line if SHOW_EDITOR: dia = PostUtils.GCodeEditorDialog() dia.editor.setText(output) result = dia.exec_() if result: final = dia.editor.toPlainText() else: final = output else: final = output print "done postprocessing." return final print __name__ + " gcode postprocessor loaded."